Can you please try with development version https://downloads.wordpress.org/plugin/youtube-channel.zip (simply extract files over old plugin through FTP).
Downloaded and installed, still not showing the lightbox. Here’s a sample page where in the sidebar I’ve put the widget…
http://www.christini.com/awd-technology/about-the-technology
It’s in there as a class, and it appears like all of the scripts are loading up in the header and footer.
I am seeing this error in the console:
TypeError: undefined is not a function (evaluating 'jQuery(window).on('load',function(){ytc_init_MPAU();})')
Hi again,
MagnificPopup require jQuery at least v1.7.2 (best if it loads v1.11.2).
Something enqueue file http://cdn.jquerytools.org/1.2.6/jquery.tools.min.js which activates jQuery v1.6.4 (instead WP bundled version), which is too old and does not support $.on().
To check this, you can open console in Chrome (F12) and enter following code to see version of active jQuery (then press Enter key):
jQuery.fn.jquery
Well that worked! Thanks for taking a look.